不像ApplicationContext那样能自动注册BeanPostProcessor. BeanFactory必须要手动注册
Resource resource = new ClassPathResource("beans13.xml");
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
BeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(factory);
beanDefinitionReader.loadBeanDefinitions(resource);
BeanPostProcessor beanPostProcessor = (BeanPostProcessor)factory.getBean("fgh");
factory.addBeanPostProcessor(beanPostProcessor);